Three D Discount Store (also known as just 3D) was a large stand-alone department store somewhat similar to K-Mart, but not as widespread. It was a division of Danners, Inc., whose largest division was the Danners 5 & 10 chain. 3D was their discount chain.
They had a location at 3620 W. 3rd St. in Bloomington from 1979 until 1987 when many of the 3D stores went out of business. Mark Mason was the manager of the Bloomington store. Their phone number was 812-334-3330.